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Method for promoting high temperature heat stability of thermoplastic polymer or compound thereof by utilizing inorganic and alkyl metallic phosphites

A thermoplastic polymer, alkyl phosphorous acid technology, applied in the field of polymer materials, can solve problems such as easy discoloration

Active Publication Date: 2019-01-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the defects that the existing commercial organic hindered phenols and organic phosphate antioxidant systems are prone to discoloration under high temperature and high shear and multi-auxiliary systems, and provides a method for improving thermoplastic polymerization by using inorganic and alkyl phosphite metal salts. A method for high-temperature thermal stability of thermoplastic polymers or their composites, which enables thermoplastic polymers or their composites to avoid problems such as crosslinking, decomposition, degradation, and discoloration under the combined action of high temperature and shear force, and maintains the material various properties of

Method used

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  • Method for promoting high temperature heat stability of thermoplastic polymer or compound thereof by utilizing inorganic and alkyl metallic phosphites
  • Method for promoting high temperature heat stability of thermoplastic polymer or compound thereof by utilizing inorganic and alkyl metallic phosphites
  • Method for promoting high temperature heat stability of thermoplastic polymer or compound thereof by utilizing inorganic and alkyl metallic phosphites

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Experimental program
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Effect test

Embodiment 1

[0058] The compound of inorganic phosphorous acid metal salt and alkyl phosphorous acid metal salt is applied to thermoplastic polymer or its composite, and the thermal stability effect is investigated according to the following steps and test methods.

[0059] 1. Mixing of compounds and thermoplastic polymers or their compounds

[0060] Add the pre-weighed compound, thermoplastic polymer, and other components according to the ratio into the high-speed mixer, start high-speed stirring, and stir for 10 minutes to complete the mixing of each component and discharge.

[0061] 2. Extrusion and granulation of materials

[0062] Set the temperature of each zone of the twin-screw extruder at the predetermined temperature, and after the temperature stabilizes for 20 minutes, start the main engine and feeder to complete the extrusion and granulation of the material. The granulated material is sent into the silo through the air conveying system and dried.

[0063] 3. Application and t...

Embodiment 2

[0075] The implementation process is the same as in Example 1, except for adjusting the ratio of aluminum methyl phosphite and aluminum phosphite, see Table 1 for other materials and their proportioning, and see Table 1 for the obtained material results.

Embodiment 3

[0077] The implementation process is the same as in Example 1, except for adjusting the ratio of aluminum methyl phosphite and aluminum phosphite, see Table 1 for other materials and their proportioning, and see Table 1 for the obtained material results.

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Abstract

The invention discloses a method for promoting high temperature heat stability of a thermoplastic polymer or compound thereof by utilizing inorganic and alkyl metallic phosphites. The compound of inorganic metallic phosphite and alkyl metallic phosphite is added into the raw materials; the addition of the compound is 0.1-2%, on the basis of the total weight of the thermoplastic polymer or compoundthereof; the weight ratio of inorganic metallic phosphite to alkyl metallic phosphite is at 1:(1-10); the structural formula of alkyl metallic phosphite is shown by formula (I) or (II); R is selectedfrom straight chain fat alkyl with 1-6 aryl groups or carbons and Me is selected from zinc, calcium or magnesium. According to the method disclosed by the invention, under the combined action of hightemperature and shearing force, the thermoplastic polymer or compound thereof is capable of avoiding the problems of cross-linking, decomposition, degradation, discoloration, and the like, and can maintain various properties of the materials.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for improving the high-temperature thermal stability of thermoplastic polymers or their composites by utilizing inorganic and alkyl phosphorous acid metal salts. Background technique [0002] The molding and processing of thermoplastic polymers need to go through a high temperature process, from a solid state at room temperature to a melt state, and the fluidity of the melt allows thermoplastic polymers to be formed arbitrarily. In the process of experiencing high temperature, polymer molecules may undergo changes such as crosslinking, oxidation, degradation (including polymer decomposition and hydrolysis), resulting in changes in processability, mechanical properties and material color. Therefore, in order to reduce the change of polymer during high temperature processing, different heat stabilizers or antioxidants are used according to different polymers. The...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L83/04C08K5/5317C08K3/32C08K7/14C08K5/5313C08K5/3492C08K5/20C08J5/04
CPCC08J5/043C08J2377/06C08L77/06C08L2201/08C08L83/04C08K5/5317C08K3/32C08K7/14C08K5/5313C08K5/34928C08K5/20
Inventor 雷华文韵豪
Owner ZHEJIANG UNIV
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